Measuring appliance



March 14, 1933.

N. G. BENNETT MEASURING AAPPLIANGE Filed June 13 Patented Mar. 14, 1933STATES NORMAN GODFREY BENNETT, oF LONDON, ENGLAND MEASURING APPLIANGE fApplication led .Tune 13, `1929, Serial No. 370,687, and in GreatBritain July 28', 1923.

This invention relates to aform of measuring appliance for use inmeasuring certain facial dimensions and is Aof particular use inprosthetic dentistry for ascertaining what is known as the height of thebite. The object of the invention is the provision of means formeasuring accurately the distances between the root of the nose, theteeth and the chin.

The invention consists in apparatus in'l cluding a framework, suitablygraduated, a xed and a sliding member mounted on and projecting rom saidframework, means for adjusting and measuring the displacement of thesliding member relative to the fixed member, means on the fixed memberfor locating its projecting end on a persons nasion and means on thesliding member for locating its projecting end on the said persons chin.

The invention further consists in appa ratus substantially ashereinafter described.

Fig. 1 shows a side view of the preferred embodiment of my invention,and

Fig. 2 shows a front view of the device shown in Fig. 1.

Two parallel vertical rods 1, 2 are connected rigidly together by meansof two Vhorizontal rods 3, 11, one at the top and one at the bottom ofthe vertical rods. The upper horizontal rod 3 projects in one directionto carry one of the attachments concerned in making the measurements.The upper horizontal rod 3 is provided with a detachable frictionallyheld end-piece 5 to carry a small portion of modelling composition whichis adapted when warm and soft to the nasion or depression at the root ofthe nose and becomes hard when chilled. A third horizontal rod 6intermediate between `the other two is made to travel up and down thetwo vertical rods by means of tubular attachments 7 and 8. This thirdrod 6 carries at its free end an attachment 9 for making contact withthe chin..

#5 Rigid with 9 is a vertical plate 10 which rests in front of the chinand is slightly convex in horizontal section and concave in verticalsection. An oblique plate 11 which impinges on the under or side of thechin, also convex 50 towards the chin, is connected to the part 10 by asliding union having a graduated scale, not' shown, for adaptation tofdiEerent thick'- nesses of chin." When adjusted, the part 11 `may beclamped to the part by means of a milled-headed screw 12, bearing upon a55 slide rod 13. A vertical stalk 14 below this chin contact carries aplunger 15 which slides in a vertical tube 16 rigidly connected with thehorizontal rod and pressesupon a compression spring 17 An index mark on'the 460 plunger 15 and a graduated scale on the tube 16 may be used toLshow to what extent the spring is compressed. This mark and scale vhavebeen omitted from the drawing Afor clearness. The whole movablehorizontal rod -6 carrying the chin-piece `9 is actuated by means of. along screw k2 0 which passes through the lower horizontal rod 4, andwhich is provided with a milledv head 21 below, and

vbears upon the lower surfaceofthe movable horizontal rod 6 above. 'v Astiff C-shaped spring 22 presses the'upper surface of the I movablehorizontal rod towards the lower surface ofthey milled head and keepsthe horizontal'rodalways in contact with the milled- 75V v.head s crew20. 'The compression springl' A:on which the plungerof the chincontactde- 'scends'permits ne'to obtainan equal degree of compression ofthesoft partsk of the chin each time a reading isv taken on the same in- 30dividual and thereby eliminates error on that account. Contact with the.chin is'madeat -two facets only by the two plates 10 and r`11 formingthe adjustable chin-piece. This enfsures` automatic adaptation to thesame two ,85 facets when pressure is brought to bear by means of thelong screw 20. The vertical rod 1 remote from the facial attachments issuit- V'ably graduated, for instance vwith a millimeter scale, and anindicator23 is attached 90 to the movablehorizontal rod 6 which slidesalong the verticalrod and gives V.readings to Y represent the distancebetween-the nasion'o'r root of the nose and the chin. These meas-vurements 4afford ,only an approximate Vcom- 95. parison betweendiiferentpersons but .are .constant when repeated on the same.individual. l

An additional attachment maybe vused whichl consists of al ,horizontalrod 24 above S100' the horizontal rod 6 carrying the chin conper end ofthe verticalro'dj 1. .The I Ol 24,- prolonged towards the face and isfurnished with a graduated scale 28. A fiatten'ed-ex: tension 29 with avsmall terminal L'piece 30 adaptedto make contact with the edges of ,theupper .Central nCiSOPS, ,Slides groove v iin-,the rod v24 and carries anindex mark l' which contacts, with ther scale 28,1 Itsus'e isv vtorelative to each other. 115v determine and indicate. the, position vofthe edges of these teeth in both-horizontal and Vvertical direction inrespect to the nasion land the nasion chin line.

y invetion, what I Yclaimas newand desire to secure by Letters Patent isHaving now described 1 A deviceV 'for `facial measurement comprisinganoblong'framework, a member engaging the opposite surface of the saidslidable member and the head of the screw.`

5. A device for facial measurementincluding a framework, a fixed and asliding member mounted upon and projecting from said framework, the axesof said fixed and said` sliding members being in one plane, means fordisplacing the sliding member relatively to the fixed member and meansfor measurlng an suhdisplacement, .a receptacle at the en of said fixedmember adapted to be filled with. a modelling composition, and a lchincontacting member, resiliently mounted near the `projeating end of saidsliding member,y and comprising apart for contacting ykv'vith the frontyof the chin and a relatively adj stable part for contacting with theunderside of the chin i In testimony whereof I have signed my name thisspecification. l i c NORMAN l GonrREY BENNETT,

fixed to and .extending laterally of said lframework,' y a plasticmaterial receiving cupl v'swivelly mounted on the freeV end of saidfixed membena member mounted nearthe vother endof theframework andlongitudinally slidable thereon, means formeasuring the displaeement* ofthe s lidableI fmember v relative to the cup;V and a chin engagingmemb'eryieldingly mounted on thefproje'cting end of the sutiable member.c i 2 A device as claimed in claim. l, wherein the, chilj @asesinarneiflfllver ,is Composed, '0f

two relativelymovable parts for respectiye- -ly wengaging "the frontand' underside surfaces of thefchin` andmejans lfor clamping said partsin thefdesired position of Ladju's'tment 3.4 device'as claimed in 4claimlifincluding an additional memberprojecting substantially at rightangles from and slidable longitu- `'dir'ially yupon saidframework andyadjustable f 'relzlrtivelyv to thjesaid fixed member, the saidaddi-tionalmember carrying at its .projecting-,end an attachmentslidableon thesaid *additional memberandlaterally of the said 5'5v Y f- 4." Adevice as claimedzm claim 1,- .wherein Y .and crossvbar's connecting thecorresponding framework, anda co'acting index andscale vassociated withsaid attachmentl and said addition'al member;l

thefiameworkincludes two elongated bars i ends ofthe barstogether sothat the elongat- 'ed'ba-'rs :are arranged in spaced parallel rela-"tionwitheach'other and wherein the means for adjusting the slidablemember includes i elongated screw engaged, thrugh one creesl hat and.CQltaCtng with Oneifsurface of the slidable member, 'and a: C-shapedspring

